/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package org.apache.storm.sql.runtime.streams.functions;

import org.apache.storm.streams.Pair;
import org.apache.storm.streams.operations.PairFunction;
import org.apache.storm.tuple.Values;

public class StreamInsertMapToPairFunction implements PairFunction<Values, Object, Values> {

    private final int primaryKeyIndex;

    public StreamInsertMapToPairFunction(int primaryKeyIndex) {
        this.primaryKeyIndex = primaryKeyIndex;
    }

    @Override
    public Pair<Object, Values> apply(Values input) {
        return Pair.of(input.get(primaryKeyIndex), input);
    }
}